1.Definition: emotions experienced when not in a state of well-being

Related Noun(s):unhappiness

Category: Feelings

2.Definition: the quality of excessive mournfulness and uncheerfulness

Related Noun(s):gloominess, lugubriousness

Category: General

3.Definition: the state of being sad

"She tired of his perpetual sadness"

Related Noun(s):sorrow, sorrowfulness

Category: General